Best Multi Stage Nonprogrammable Digital Thermostats

Two-stage heating means the furnace has two levels of heat output: high for cold, winter days and low for milder days. Since the low setting is adequate for meeting 80% of household cooling demands, a two-stage thermostat runs for longer periods and provides more even heat distribution.

A heat pump, on the other hand, is a single system that heats and cools. If you have a heat pump, you won't have a separate air conditioning system. A multi stage heat pump also has an emergency or auxiliary heat setting for especially cold days. These systems are popular all over the country, particularly in the Northeast. Heat pumps generally have more than five wires and almost always with a W2 and a C or X wire.